Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ef2086748c69fd0…

MALICIOUS

PDF

35.0 KB Created: 2020-08-31 07:41:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9c12fdbe68dbea800c76c92f5a893f6 SHA-1: eb052cbb2106b1c718cee2dc64b8e6d56096c03c SHA-256: 6ef2086748c69fd055f71ed5bb714d0dedd42366a46193ccc5044d485e72dcc6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that point to a known malicious redirector, ttraff.ru. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure the user to malicious infrastructure. The heuristic PDF_SEO_LINK_FARM indicates a large number of outbound links, further supporting the malicious intent of redirecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/wix?keyword=fr%253F+trackid%253D+sp-+006
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/dfb5f8_df948bdd96704d329bc70fd93c3bbcfc.pdf
    • https://static.usrfiles.com/ugd/b8c837_56d54847a64f4655a2ec39c63baa34b4.pdf
    • https://static.usrfiles.com/ugd/b8c837_f98fac90fa214322abfe941517a167fb.pdf
    • https://static.usrfiles.com/ugd/b8c837_26450e6b92e34791a8b4ded296ad509b.pdf
    • https://static.usrfiles.com/ugd/270e53_cc1cc34156e745f3a52897b96082c75c.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f2ba7c7dd6148fb955195fcd3266268.pdf
    • https://static.usrfiles.com/ugd/7dd30d_d5e5faaa189a48c7834ce80d47b23e5f.pdf
    • https://static.usrfiles.com/ugd/defdb4_b386948c4ce24568b1bdb3472ee3b7ba.pdf
    • https://static.usrfiles.com/ugd/b8c837_05541944863e4a8cb301cb6a7e10482f.pdf
    • https://static.usrfiles.com/ugd/1ee69b_e06b9b847de0434e8c84637b99f9e16b.pdf
    • https://cdn.shopify.com/s/files/1/0435/4582/1333/files/22158635702.pdf
    • https://cdn.shopify.com/s/files/1/0437/7139/6257/files/ableton_push_2_manuale_italiano.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xasojikunu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6314/8706/files/96982460624.pdf
    • https://cdn.shopify.com/s/files/1/0438/5210/3845/files/80726272108.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000048e3.bin
d77ba0ee65246de6588bbead6f2545b56948cb27ed6dafddb03477f04e0c5ca7
pdf-font-stream PDF embedded font (sfnt) at offset 0x48E3 5572 bytes
font_01_sfnt_off00005be8.bin
65a6d09321ba50de7ebaa59a909dd64cdcd7e40fbaf8b055965ed5a7334ab3e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BE8 10452 bytes